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(No Model.) 3 SheetsSheet 1. W. R. DUNLAP.

OENTRIPUGAL REEL. No. 432,519. Patented July 22, 1890.

(No Model.)

3 Sheets-Sheet 3.

W. R. DUNLAP.

GENTRIFUGAL REEL."

No. 432,519. Patented July22, 1890.

THE cams PETERS 00., Puma-unis wnsumarcn, n. c.

UNITED STATES PATENT QFFICEw WILLIAM R. DUNLAP, OF CINCINNATI, OHIO; ELLA M. DUNLAP AND J. L. LOGAN EXECUTORS OF SAID VILLIAM R. DUNLAP, DECEASED.

CENTRIFUGAL REEL.

SPECIFICATION forming part of Letters Patent No. 432,519, dated July 22, 1890.

Application filed January 15, 1887. Serial No. 4- (N0 mOd To all whom it may concern:

Be it known that I, WILLIAM R. DUNLAP, a citizen of the United States, and a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Centrifugal Reels, of which the following is a specification.

My invention is an improved reel for bolting and dressing flour, andis an improvement upon the reel for which Letters Patent No. 341,184 were granted to me May 4, 1886.

The invention will be first fully described in connection with the accompanying drawings, and then particularly referred toand pointed out in the claims.

Referring to the drawings, in which like parts are represented by similar referenceletters Wherever they occur throughout the various views, Figure 1 is a longitudinal axial section taken through the bolting-reel in line as 00 of Fig. 2. Fig. 2 is a transverse vertical section of the bolting-chest, taken through line 2 1 Fig. 1. Fig. 3 is an enlarged detail view, in transverse section, of one of the cylinder-staves and one of the heaters. Fig. etis an elevation of the same. Fig. 5 is a partial end elevation, upon an enlarged scale, of the outer cylinder. same, taken through line 1) o; and Fig. 7 is an edge elevation of the cylinder end and cloth-stretcher. Fig. 8 is a diagram of the gearing for driving the cylinder either in the same or in opposite directions.

The novel features of my invention are the staves which cover the inner cylinder, the de vices for stretching the cloth upon the outer cylinder, and the gearing controlling the rotation of the cylinders with relation to each other. The frame-work of the machine and reels and the conveyors for feeding the material to the reel and discharging the bolted material from the b0lting-chest are constructed in the usual manner. The heaters for impelling the material against the bolting-cloth and the means for adjusting the heaters are the same as in my before-mentioned patent. I

will therefore describethe novelfeatures themselves and their connection and combination with the well-known features with particularity without minutely describing the parts well known.

Fig. 6 is a sectional view of the Instead of tho dust-tight inner cylinder heretofore used I cover my cylinder-frame A with sheet-metal staves a, which extend from end to end of the cylinder. There is the same number of these staves as there is of the heaters B. One edge of each stave turns outwardly and around the beater-shaft b, and the opposite edge curves inwardly, leaving an. open space between the inturned leading edge of one stave and the upturned following edge of the stave in advance of it. These openings should each be about three-fourths of an inch in width, and the curved edges of the staves should project inwardly about one inch. The staves are secured upon the armed wheels C of the cylinder by rivets or screws. The ends of the cylinder are closed dusttight.

In the cylinders constructed with what are intended to be dust-tight coverings it frequently happens that either through accident, imperfect workmanship, or shrinking or expansion of material small openings occur in the covering. Through these openings, however small, flour-dust would enter the cylinder, which would not be expelled through the same openings, but, accumulating upon the inside, would throw the cylinder out of balance and impair the efficient working of the machine. No considerable amount of dust will enter my cylinder when in operation, and such as does enter will be soon expelled outwardly through the longitudinal slots by the inwardly-curved edges of the staves. The openings in the inner cylinder also prevent counter air-currents between the inner and outer cylinder, which are caused by the partial vacuum formed back of the blades when revolving between the closed cylinders.

I find that in handling some kinds of finelypulverized flour stock the capacity of the reel may be greatly increased by gearing the cloth-cylinder to run in the opposite direction from the inner or heater cylinder and adjusting the beater-blades t0 incline forward of the radii of the cylinder. The forward inclination required is determined by the character of material under treatment, and the blades are simultaneously adjusted to the proper angle by the means fully set forth in my former patent. In this arrangement the material lifted by the beaters will be carried over the top of the beater-cylinder and evenly distributed against the inside of the clothcylinder.

The means by which the outer cylinder may be revolved in the same direction as the inner cylinder, or in the opposite direction when desired, will now be described. Referring first to Fig. l, D is the main shaft, upon which is secured the beater-cylinder A. The shaft has also secured upon it, outside of the head end of the machine,a driving-pulley D. The ends of the cloth-cylinder E have hubs e 6 extending outwardly from them, which hubs have their bearings in the end of the machine. The hub e at the tail end of the machine has secured upon it an internally and externally toothed wheel F. The internal teeth of the wheel F mesh with the teeth of an intermediate cog-wheel G, which engages a cog-wheel II, which is secured upon the shaft D. A cog-wheel I is secured upon the end of the shaft D outside of the bearings to drive a shaft J through a cog'wheel K. Secured upon shaft J is a cog-wheel L, which meshes with the external teeth upon wheel F. The wheels G and L are arranged to slide upon their shafts, so that either may be thrown in or out of gear, as indicated by dotted lines, Fig. 1. Now it will be seen that when it is desired to have the innerand outer cylinder revolve in the same direction the cog G is thrown out of gear and the clothcylinder is revolved by the cog L engaging the external teeth of the wheel F, and when it is desired to have the cloth-cylinder revolve in the opposite direction from the inner cylinder the cog L is thrown out of gear andthe cloth-cylinder is revolved by the cog G engaging with the internal teeth of the wheel F.

By the means above described the machine maybe readily adjusted to distribute the material under treatment uniformly over the inside of the cloth-cylinder, and thus greatly increasing the capacity of the reel; but this increased bolting capacity requires a correspondingly-increased amount of material to be retained in the cloth, increasing the strain or tension upon the cloth and requiring frequent tightening. I have invented a means to readily tighten the cloth which I will now describe. The iron rods M, which stay the ends of the cloth-cylinder E, extend through the tight head E from four to six inches, and the projecting ends are screw-threaded their full length. N is a cast-iron ring, to which is secured a wooden ring N. These rings are of the same diameter as the end E. The ring N N slips loosely over the projecting ends of the rods M, and is held in the desired position by nuts or n. The cloth e is secured upon the opposite head E of the cylinder-by means of a clamping-band in the usual way. The movable ring N N is brought up close to the end E. The cloth is now stretched endwise over the movable ring by a pair of pliers and tacked onto the wooden ring N. The tape attached to this end of the cloth extends inside of the end E, around which is a clamping-band 0, similar to the one upon. the opposite end E, which firmly clamps the cloth upon the end E by means of a screw 0. \Vhen the cloth requires tightening, this clamping-band O is loosened, the nuts 71. backed off the requisite distance, and the ring N N forced back against them by the nuts or inside of the ring N N. \Vhen the cloth has been given the proper tension, the clamping-band O is again tightened.

I claim as my invention 1. In a centrifugal reel, the combination of the outer cylinder, the inner cylinder having closed ends and staves a secured upon said inner cylinder, the leading edges of said staves curving inward and their opposite edges curving around the beater-shafts, and the adjustable blades mounted upon shafts around said inner cylinder, substantially as set forth.

2. The combination, substantially as specified, of the bolting-cylinder, the inner cylinder composed of staves a and boaters B, the shaft D, the internally and externally cogged wheel F, and the cogs G, H, I, L, and K, the said cogs G and Lbeing arranged to be thrown in or out of gear for the purpose of revolving the outer cylinder either in the same direction as the inner cylinder or in the opposite direction at will, as set forth.

WILLIAM R. DUNLAP.

Witnesses:

Gno. J. MURRAY, Anos G. WooLLnY. 

